diff --git a/libraries/APM_RC/APM_RC_APM1.h b/libraries/APM_RC/APM_RC_APM1.h
index 945150f57a..1e76cecf01 100644
--- a/libraries/APM_RC/APM_RC_APM1.h
+++ b/libraries/APM_RC/APM_RC_APM1.h
@@ -9,33 +9,33 @@
 
 class APM_RC_APM1 : public APM_RC_Class
 {
-  public:
-	APM_RC_APM1();
-	void Init( Arduino_Mega_ISR_Registry * isr_reg );
-	void OutputCh(uint8_t ch, uint16_t pwm);
-	uint16_t OutputCh_current(uint8_t ch);
-	uint16_t InputCh(uint8_t ch);
-	uint8_t GetState();
-	bool setHIL(int16_t v[NUM_CHANNELS]);
-	void clearOverride(void);
-	void Force_Out(void);
-	void SetFastOutputChannels(uint32_t chmask, uint16_t speed_hz = 400);
+public:
+    APM_RC_APM1();
+    void            Init( Arduino_Mega_ISR_Registry * isr_reg );
+    void            OutputCh(uint8_t ch, uint16_t pwm);
+    uint16_t        OutputCh_current(uint8_t ch);
+    uint16_t        InputCh(uint8_t ch);
+    uint8_t         GetState();
+    bool            setHIL(int16_t v[NUM_CHANNELS]);
+    void            clearOverride(void);
+    void            Force_Out(void);
+    void            SetFastOutputChannels(uint32_t chmask, uint16_t speed_hz = 400);
 
-	void enable_out(uint8_t);
-	void disable_out(uint8_t);
+    void            enable_out(uint8_t);
+    void            disable_out(uint8_t);
 
-	void Force_Out0_Out1(void);
-	void Force_Out2_Out3(void);
-	void Force_Out6_Out7(void);
+    void            Force_Out0_Out1(void);
+    void            Force_Out2_Out3(void);
+    void            Force_Out6_Out7(void);
 
-  private:
+private:
 
-    static void _timer4_capt_cb(void);
+    static void                     _timer4_capt_cb(void);
 
-    static volatile uint16_t _PWM_RAW[NUM_CHANNELS];
-    static volatile uint8_t  _radio_status;
+    static volatile uint16_t        _PWM_RAW[NUM_CHANNELS];
+    static volatile uint8_t         _radio_status;
 
-    int16_t _HIL_override[NUM_CHANNELS];
+    int16_t                         _HIL_override[NUM_CHANNELS];
 };
 
 #endif